#define BUTTON 4
int LED[] = {5, 6, 9, 10, 11};
int val[5] = {255, 255, 0, 255, 255};
int clk = 0;
#define DELAY 100
#define STEP 100
#define STOP 1000
int delay_time = DELAY;
bool pressed = 0;
unsigned long checkpoint = 0;

bool isPressed() {
  static bool last = 1;
  int result = 0;
  if (last == 1 && digitalRead(BUTTON) == LOW) {
    result = 1;
  }
  last = digitalRead(BUTTON);
  delay(1);
  return 0;
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  for (int i = 0; i < 5; i++) {
    pinMode(LED[i], OUTPUT);
    digitalWrite(LED[i], HIGH);
  }
  pinMode(BUTTON, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (isPressed()) {
    pressed = !pressed;
    if (!pressed) {
      delay_time = DELAY;
    }
    Serial.println(pressed);
  }

  if (millis() - checkpoint > delay_time) {
    if (pressed) {
      delay_time += STEP;
    }
    if (delay_time < STOP) {
      for (int i = 0; i < 5; i++) {
        analogWrite(LED[i], val[(i + clk) % 5]);
      }
      clk += 1;
    }
    
    checkpoint = millis();
  }
}